Abuse of alcohol is defined as an average weekly intake of greater than 21 units or an average daily intake of greater than 3 units (males) or defined as an average weekly intake of greater than 14 units or an average daily intake of greater than 2 units (females). The number of units of alcohol in a drink can be determined by multiplying the volume of the drink (in millilitres) by its percentage ABV and dividing by 1000